REDLINE synthetic engine oils are designed to provide the highest protection, cleanliness and superior drain intervals with the lowest friction for your petrol, diesel, motorcycle or marine engine. REDLINE Synthetic 15W50 is the ultimate high-temperature protection and recommended for street use. Good for engines that regularly run very high oil temperatures. Best for engines that run large clearances, big displacement, and racing engines that see occasional street use.

Popular in air-cooled VW and Porsche applications as well as heavily-boosted turbocharged applications. Provides 25% more viscosity in bearings than petroleum 20W50s. Not recommended for use in cold climates where temperatures are at or below 10°F or -12°C. Not recommended for street use in production engines that see sustained oil temperatures below 107°C (use Red Line 10W30 or 10W40).

Performance Features

• Fully-synthetic ester formula for passenger cars, light trucks, performance vehicles and marine applications
• Excellent wear protection and friction reduction across a wide range of operating conditions
• High detergency allows extended drain intervals and provides increased cleanliness
• Improved fuel economy and ring seal for more power
• Superior high temperature stability and oxidation resistance increases lubrication of hot metal compared to other synthetics
• High natural viscosity index (VI) provides thicker oil film in bearings and cams
• Less evaporation than other synthetics for improved efficiency and ring seal
• All products are completely compatible with other conventional and synthetic motor ...

REDLINE synthetic engine oils are designed to provide the highest protection, cleanliness and superior drain intervals with the lowest friction for your petrol, diesel, motorcycle or marine engine. REDLINE Synthetic 15W50 is the ultimate high-temperature protection and recommended for street use. Good for engines that regularly run very high oil temperatures. Best for engines that run large clearances, big displacement, and racing engines that see occasional street use.

Popular in air-cooled VW and Porsche applications as well as heavily-boosted turbocharged applications. Provides 25% more viscosity in bearings than petroleum 20W50s. Not recommended for use in cold climates where temperatures are at or below 10°F or -12°C. Not recommended for street use in production engines that see sustained oil temperatures below 107°C (use Red Line 10W30 or 10W40).

Performance Features

• Fully-synthetic ester formula for passenger cars, light trucks, performance vehicles and marine applications
• Excellent wear protection and friction reduction across a wide range of operating conditions
• High detergency allows extended drain intervals and provides increased cleanliness
• Improved fuel economy and ring seal for more power
• Superior high temperature stability and oxidation resistance increases lubrication of hot metal compared to other synthetics
• High natural viscosity index (VI) provides thicker oil film in bearings and cams
• Less evaporation than other synthetics for improved efficiency and ring seal
• All products are completely compatible with other conventional and synthetic motor oils

• Popular in turbocharged applications
• For wider bearing clearances and racing engines that see occasional street use
• Not recommended for use in cold climates (-20C/-4°F for 15W50)
• Recommended for API SM/SL/SJ/SH/SG/CF and ACEA A3/B3/B4